Todo list in order:-
1. Pressure Test the Head.
2. If OK them get head skimmed to ensure correct mating to block
3. If not OK then obtain new head and lap and fit valves and springs
3. Obtain Multi Layer Steel (MLS) head gasket with correct number of holes (thickness indicators)
4. Obtain new locating dowels and fit to block
5. Clean out all head bolt holes and run appropriate bottoming tap into each.
6. Refit head and ensure that the torque settings and the subsequent angular tightening of all head bolts is done in the correct order.
7. Once all is assembled, ensure that the cooling system is correctly bled of all air. This can take a while but is imperative that it is done well. Coolant should be
50/50 Concentrate/Water (demineralised water is best)
Hope this helps.